Hoang NK, Phuong NV, Long LB. Potential solution in sustainable agriculture: improving the pH and pH buffering capacity of gray soil Acrisol from Cu Chi, Ho Chi Minh City, Vietnam using biochar combined with bentonite. Sains Tanah J. Soil Sci. Agroclimatology. 2023;20(1):87-93. doi:10.20961/stjssa.v20i1.63685